Finding the Fourth Proportional to 78,783.30, 108,722.52 and 42,974.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,783.30 : 108,722.52 = 42,974.28 : x
2. Step 2: Convert to fraction form
   78,783.30/108,722.52 = 42,974.28/x
3. Step 3: Cross multiply
   78,783.30x = 108,722.52 × 42,974.28
4. Step 4: Simplify right side
   78,783.30x = 4,672,272,016.79
5. Step 5: Solve for x
   x = 4,672,272,016.79/78,783.30
6. Step 6: Final answer
   x = 59,305.36